[time-picker] i18n.formatTime and .parseTime are called multiple times unnecessarily

[pleku]

After returning a valid object from i18n.parseTime function after end user input

• the parseTime is called in total 2-3 times, depending on whether or the user has entered 1-1 value matching the drop down or not
• the formatTime is called also multiple times if the input value does not match fully of something in the drop down

After returning a valid object from i18n.parseTime function after user selects a value from the drop down

• the formatTime is called twice with the same paramater second time unnecessarily

These don't cause much overhead probably, but is still very weird since it is just unnecessary and the return values are the same

[yuriy-fix]

Requires refactoring of the webcomponent. Will be done later.